[A11y] Address possibility of nodeless object with content-visibility rule

aleventhal · chromium-wpt-export-bot · commit a4934f725f69 · 2023-09-13T11:27:26.000-07:00
Note that the new test does not exercise all of the added code, because an AXObject never existed for the nodeless layout object in the scrollbar. However, rather than hitting a CHECK(), the code will now continue and ensure that if there is a subtree of AXObjects based only on layout objects, that they are removed in this case. Fixed: 1481892 Change-Id: Iebacc810852c0a34e6f743a821957360bcfd69d4 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4860045 Reviewed-by: Chris Harrelson <chrishtr@chromium.org> Commit-Queue: Aaron Leventhal <aleventhal@chromium.org> Cr-Commit-Position: refs/heads/main@{#1196125}
diff --git a/accessibility/crashtests/null-node.html b/accessibility/crashtests/null-node.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<style>
+::-webkit-scrollbar-track, ::-webkit-scrollbar {
+  color: red;
+}
+::-webkit-scrollbar-track:horizontal:disabled {
+  content-visibility: hidden;
+}
+</style>
+<main style="height: 100px; width: 100px; overflow: scroll;"></main>
